JPS609196Y2 - Air valve in high viscosity liquid carrier - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an air valve used in a transport vehicle for transporting a high viscosity liquid such as asphalt.

Generally, transport vehicles that transport high-viscosity liquids such as asphalt discharge the high-viscosity liquid by pressurizing the inside of the tank with air.

For this reason, conventional high-viscosity liquid transport vehicles have a structure in which the air pipe extending from the compressor on the vehicle body faces into the tank from the top of the tank, and an air valve is also installed on the air pipe located outside the tank. .

However, with the above structure, since the distance from the tip of the air pipe facing into the tank to the air valve is long, high viscosity liquid that enters the pipe due to vibrations of the car body, etc. may adhere and solidify, blocking the pipe. Therefore, even if the air valve is opened, high-pressure air cannot flow into the tank, making it impossible to discharge high-viscosity liquid.

The present invention is intended to eliminate the above-mentioned drawbacks, and an embodiment will be described below with reference to the drawings. Reference numeral 1 is a tank mounted on a vehicle body 2 with a slight backward inclination, and the tank 1 has an inner tank 3 and an outer tank 3. It has a heat insulating structure in which a heat insulating material 5 is filled between the tanks 4.

At the rear of the tank 1, there is provided a discharge pipe 6 that penetrates the top wall of the tank 1 and has its tip facing the inner bottom of the tank 1. At the tip of the pipe 6 is an on-off valve 7 that can be opened and closed from above the tank 1. is interposed.

Reference numeral 8 denotes a compressor mounted on the vehicle body 2 in front of the tank 1. The compressor 8 pressurizes the inside of the tank 1 via an air valve 10 (described later) installed at the top of the front of the tank 1 in an air pipe 9. It is designed to discharge high viscosity liquid.

Next, the air valve of the present invention will be explained with reference to Figure 2.Tank 1
At the front top, there is a cylindrical mounting member 11 that penetrates the top wall surface.
A cylindrical valve box 12 is inserted into the mounting member 11, and the valve box 12 is secured with bolts 14 via a flange 13 of the center shaft of the valve box 12.

The valve box 12 has an inlet 15 communicating with the air pipe 9 on its upper side, and an outlet 16 opening into the tank 1 at a lower position close to the inner tank 3.

A valve seat 17 facing downward is located at the edge of the outlet 16 of the valve body 12.
It is welded.

Below the valve seat 17 is a valve body 18 that opens and closes the outlet 16.
This is provided.

A handle 19 is fixed to the upper end of the center of the upper surface of the valve body 18, and the lower end of a valve rod 22 formed from a threaded portion 21 that threads into a threaded hole 20 above the valve body 12 is connected to the middle of the handle 19. By turning , the valve body 18 is lowered and the outlet 16 is opened.

23 is a lid that closes the screw hole 20.

24 is a support frame that supports the valve stem 22. The present invention has the above-mentioned structure. Next, the operation will be explained. When discharging high viscosity liquid, first the handle 19 of the air valve 10 is
Turn to lower the valve body 18 and open the outlet 16 (.

At that time, the inner tank 3, outlet 16 and valve seat 17 are approximately the same.
Because it is formed on a flat surface, almost no high viscosity liquid adheres or coagulates inside the valve body 12, and as the valve body 18 is moved downward, no coagulated substances adhere or coagulate on the valve 18 or valve seat 17. Since it is easily broken down, the outlet 16 can be reliably opened.

Next, when the compressor 8 is operated in this state, air is supplied to the tank 1 through the air pipe 9 and the air valve 10, and the inside of the tank 1 is pressurized.

When the on-off valve 7 of the discharge pipe 6 is opened after the inside of the tank 1 is pressurized, the high viscosity liquid passes through the discharge pipe 6 under the pressure of air and is discharged to the outside of the tank 1.

As described above, in the present invention, the valve seat is provided at the outlet edge of the valve body and is formed downward, so that almost no high viscosity liquid adheres and coagulates inside the valve body, and no coagulation adheres to the valve body or valve seat. Objects can be easily destroyed by opening the valve body, and there is no possibility of blocking the air flow path and making it impossible to discharge high viscosity liquid as in the past.

[Brief explanation of drawings]

FIG. 1 is an overall view of the high viscosity liquid carrier, and FIG. 2 is an overall sectional view of the air valve. 1 is a tank, 10 is an air valve, 12 is a valve box, 15 is an inlet, 16 is an outlet, 17 is a valve seat, 18 is a valve body, and 22 is a valve stem.

Claims (1)

[Scope of utility model registration request] A cylindrical valve box having an inlet communicating with the compressor at the top and an outlet opening into the tank at the bottom is provided at the top of the tank, and a valve seat is formed downward at the edge of the outlet of the valve box, An air valve for use in a high-viscosity liquid transport vehicle, in which a valve body that is opened and closed from outside the valve box is brought into contact with the valve seat.